Zeneca Limited

Sarjit S Johal

Mark R Schmitt

Christina L Hartman

This invention pertains to methods for using oxalate oxidase in plant pathology. A substantially pure gene encoding the oxalate oxidase enzyme is elucidated. The expression product of the gene which can be stably incorporated into a foreign plant host has a unique profile including a pH optimum of 3.5, a positive heat stability, a single sub-unit of approximately 25 kilodaltons and protease stability. The methodology of this invention exploiting oxalate oxidase for protection against oxalic acid encompasses providing to a plant in need of oxalic acid protection an oxalic acid degrading enzyme in an amount sufficient to protect the plant from the oxalic acid.

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Newtown, PA, United States of America

Sarjit S Johal